## {4,4}, tetromino 1S (I), solution 3
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,2,2,1,1,2,2,2)
# the Conway notation
conway("(0 3)[1 2](4 9)(5 8)[6 7]")
sublines(1)